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Antioxidant enzymes. The superoxide radical anion can be transformed either to H2O2 SOD. The hydrogen peroxide can be converted to H2O and O2 by CAT and/or GPX/PRX. H2O2, hydrogen peroxide; SOD, superoxide dismutase; CAT, catalase; GPX, glutathione peroxidase; PRX, peroxiredoxin enzymes.
